int main()
{

    int a=3;
    int*p=&a;
    printf("&a=%d  a=%d \n",&a,a);
    printf("&p=%d  p=%d *p=%d\n",&p,p,*p);

    ++a;

    printf("&a=%d  a=%d \n",&a,a);
    printf("&p=%d  p=%d *p=%d\n",&p,p,*p);

    ++*p;

    printf("&a=%d  a=%d \n",&a,a);
    printf("&p=%d  p=%d *p=%d\n",&p,p,*p);
}
